Knowledgebase: Miscellaneous
Does NAS need defragment?
Posted by Yvon Lei, Last modified by on 20 June 2008 03:55

Almost all Linux-based NAS doesn’t need to defrag because they are based on ext3 files system, and the ext3 file systems will attempt to keep fragmentation at minimum.

The file system keeps all blocks in a file close together by pre-allocating data blocks to regular files before they are actually used. Therefore, when a file is increases in size, several adjacent blocks are already reserved, and will reduce file fragmentation. It is, therefore, unnecessary to analyze the amount of fragmentation.

If you want to know more, please refer to Wikipedia.

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